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M. Jambulingam ¹, N. Renugadevi ², S. Karthikeyan ³, J. Kiruthika ⁴

Affiliations
1 Department of Chemistry, PSG College of Arts and Science, Coimbatore, Tamil Nadu, IN
2 Department of Chemistry, Avinashilingam Deemed University, Coimbatore, Tamil Nadu, IN
3 Department of Chemistry, Erode Sengunthar Engineering College, Erode, Tamil Nadu, IN
4 Department of Biotechnology, Karpagam Arts and Science College, Coimbatore, Tamil Nadu, IN

Abstract

Studies on removal of Cr (VI) from aqueous solution using activated pomegranate peel carbon have been carried out at 32°C. Various parameters such as initial concentration of adsorbate, pH, adsorbent dosage and agitation time were studied by conducting batch mode experiments. The experimental adsorption data fitted reasonably well to Langmuir and Freundlich adsorption isotherms. The adsorption follows Lagergren first order kinetic model. The thermodynamic parameter enthalpy change (DH) suggests exothermic nature of adsorption of Cr(VI) on to activated pomegranate peel carbon.

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S. Umadevi ¹, N. Renugadevi ²

Affiliations
1 Sri GVG Visalakshi College for Women, Udumalpet, Tamil Nadu, IN
2 Avinashilingam Institute for Home Science and Higher Education for Women, Tamil Nadu, IN

Abstract

Adsorption process has been found to be one of the best treatment methods for the removal of dyes from aqueous solution. This study was carried out to examine the adsorption capacity of the low cost adsorbent prepared from ripened Bauhenia racemosa seed pods(BRSP) for the removal of Remazol black 5(RB5) dye from aqueous solution. The influence of contact time, pH, adsorbent dose on the adsorption process was studied. The experimental results indicated that the rate of adsorption increased rapidly with time and equilibrium was attained within about eighty minutes. The adsorption kinetics of Remazol black 5 onto the low cost adsorbent used in this study followed first order Lagergren kinetic rate equation. The intra particle diffusion study shows that the rate constants for intra particle diffusion (Kp)increased with increase in initial concentration of Remazol black 5 solution.

Keywords

Bauhenia Racemosa, Remazol Black 5, Kinetic Modeling, Intra Particle Diffusion.

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